Improvement in crimping-forms for boot-uppers



J. B. CLAIR. CRIMPING-FORMS FORBOOIf-UPPERS.

No. 192,111. Patented June 19, 1877.

NPETERS, FHOTO-LITHQGRAFHER, WASHINGTON. D C.

UNITED, STATES PATENT OFFICE.

JOHN B. CLAIR, 0F OLDTOWN, MAINE, 'Assrenon OF ONE-HALF HIS RIGHT TOJAMES w. WALDRON, OF SAME PLACE.

IMPROVEMENT IN CRIMPING-FORMS FO R BOOT-UPPERS.

Specification forming part of Letters Patent No. l92 ,lll, dated June19, 1877; application filed November 2, 1876. 1

To all. whom it may concern:

Be it known that I, JOHN B. CLAIR, of Oldtown, in-the county ofPenobscot and State of Maine, have invented certain new and usefulImprovements in Crimping-Form for the Uppers of Boots; and I do herebydeclare that the following is a full, clear, and exact descriptionthereof, that will enable others skilled in the art to which itappertains to make and use the same, reference being had to theaccompanying drawings, forming apart of this specification, in which-Figure 1 shows a side view of my invention; Fig. 2, detail, showingclamp k.

The same letters show like parts.

The object of my invention is the production of a crimping-form for theuppers of boots, which shall do its work with less danger of wrinklingor tearing the leather, and with greater rapidity and certainty, thanthose now in use. I

My invention will be readily understood by reference to the accompanyingdrawings, in whicha shows a form of the ordinary shape, having aportion, b, at its back out out and attached by a'hinge. To this part bis attached a metal extension, 0, the whole form-- ing one jaw, d, ofthe machine. To the under side of the foot part of the form is attacheda metal: guard, e, to which, at the toe end, is hinged a metal jaw, f,the two jaws d f meeting at and opening from the heel. These jaws. aregrooved upon their inner sides, as is also the guard 0, so as to inclosean angle-iron, 9, through the 'angle of which passes a screw, h, into abearing in the guard 0, so that by turning the screw the angleiron isforced outwardly, drawing with it the jaws df, which slide upon itsinclined sides. At 13 z are springs secured to the stationary partof theform, and passing through slots j j in the jaws d f, respectively, andacting on said jaws in such a manner as to create a tendency to close.To the ends of these springs projecting through the slots, or to thejaws themselves, if preferred, are pivoted the clamps for holding theleather. These clamps are peculiar in construction, shutting over eachside of the jaws d f, which are suitably roughened to hold the leather.The pivot upon which they turn is placed at the upper corner nearest theheel of the machine, causing the clamp toact as a cam. The upper part 1of the angle-iron g is so formed as to act as the center or heel clampin conjunction with a cap. It is rectangular in horizontal section, andis largest at the bottom, having its sides grooved or corrugated. Abovethis, on the screw, slides the cap m, roughened upon its inner surface,and .shutting down over the part l of the angle-iron, securing theleather between the roughened surfaces.

The operation of my machine is as follows: The bootfront taken from thebreaker is placed over the form, an d the clamps k It turned down overthe leather, pinching it between the jaws and the clamp. The heel partis also drawn into place over the partl of the angle-iron, and the clampm pressed over it. The front is now secured in place, and, the screw itbeing turned, the angle-iron g is forced out,

opening the jaws and stretching the leather to the form. As thestretching proceeds the leather is drawn down into the angle a of theform, and also from the clamps la it toward the center clamp lm, theline of the greatest stretch being on the line a n, and decreasing oneither side, causing a tendency to wrinkle.

This .is obviated by the method of attaching the clamps is k, which,operating as cams, give slightly as the stretching proceeds, holding theleather firmly, but not rigidly. This, moreover, greatly lessens thedanger of tearing of the leather. This efiect of the clamps is increasedif they are pivoted to the ends of the springs t 11, which give anelasticity to the fastening.

What I claim asmy invention, and desire to secure by Letters Patent, is-

1. In a crimping-form for the uppers of boots, the combination of theform a, springjaws df, angle-iron g, screw h, and clamps l m and k is,all operating as set forth, for the purposes specified. y Y

2. In a crimping-form for the uppers of boots, substantially as hereindescribed, the

.eccentrically pivoted leg and foot clamps k k,

as and for the purposes set forth. I

3. The springs i i, in combination with the leg and foot clamps k keccentrically pivoted In testimony. thatl claim, the foregoing Ithereto, as and for the purposes described. have hereunto set my handthis 30th day of 4. A crimping-form for the uppers of boots October,1876'.

in which the leg and foot portions of said JOHN B. CLAIR.

front are retained in place on the form by elas- Witnesses:

tic fastenings, substantially as described, for JOHN R. MASON, I

the purposes specified. WM. FRANKLIN"'SEAVEY.

